SERVING THE GREATER SILICON VALLEY SINCE 1906

INNOVATIVE TECHNOLOGY + OLD FASHIONED VALUES

NEW INSTALLATIONS

With over 100 years experience in heating and cooling, from basic to custom installations, we have the expertise to complete any job. Our technicians will work with you to find the best options for your needs.

24/7 LIVE OPERATOR:

(408) 295-2182

24 HOUR EMERGENCY SERVICE

Your emergency is our emergency! When time is not on your side, call O.C. McDonald’s 24-hour live operator and we’ll have one of our many experienced technicians address your issue with speed!

Request an Estimate

Our experienced technicians will help you save money before any work begins. We will let you know exactly what your options are and what it will cost. We like to think of it as a “no surprises approach.” With service like this, it will come as no surprise that O.C.McDonald has been in business for over 100 years.